This handout covers how to cite sources within the body of your paper, known as in-text citations. See APA â References for how to compile your list of sources at the end of your paper. For other APA style rules, see the links on the right side of this page.
Rear-wheel drive (RWD) typically places the engine in the front of the vehicle and the driven wheels are located at the rear, a configuration known as front-engine, rear-wheel drive layout (FR layout). The front mid-engine, rear mid-engine and rear engine layouts are also used.
In engineering terms, four-wheel drive designates a vehicle with power delivered to four wheel ends spread over at least two axles. The term 4Ã4 (pronounced four by four) was in use to describe North American military four-wheel-drive vehicles as early as the 1940s, with the first number indicating the number of wheel ends on a vehicle and the second indicating the number of driven wheels.